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We use them in conjunction with solar-powered model car kits which students have to build themselves. These receive energy through solar powered panels allowing us also to teach ideas about renewable energy as well as electricity. The solar panels also allow us to integrate problem solving into lessons, with students having to investigate when panels work best.
Therefore students can have difficulty grasping the ideas and principles involved and constructing understanding. Misconceptions may develop, with students believing electricity is a substance which gets used up. Understanding of electricity involves students acquiring a specialised specific set of vocabulary. However, although we cannot see electrical charges moving and transferring energy, the effect of the transfer can be seen.
Such abstract concepts can be explained using analogies which use familiar words or ideas to represent the ideas which need to be conveyed. Analogies are selected which students should already be familiar with. However, no single analogy can represent all features of an electrical circuit and there are important differences between the analogies used and circuits. Instead appropriate analogies should be chosen to teach selected concepts and students should be prompted to compare analogies with circuits and identify how they differ.
A circuit diagram or wiring diagram uses symbols to represent parts of a circuit.
